python-mylib/mylib/__init__.py

""" Some really common helper functions """

#
# Pretty formating helpers
#


def increment_prefix(prefix):
    """ Increment the given prefix with two spaces """
    return f'{prefix if prefix else "  "}  '


def pretty_format_value(value, encoding='utf8', prefix=None):
    """ Returned pretty formated value to display """
    if isinstance(value, dict):
        return pretty_format_dict(value, encoding=encoding, prefix=prefix)
    if isinstance(value, list):
        return pretty_format_list(value, encoding=encoding, prefix=prefix)
    if isinstance(value, bytes):
        return f"'{value.decode(encoding, errors='replace')}'"
    if isinstance(value, str):
        return f"'{value}'"
    if value is None:
        return "None"
    return f'{value} ({type(value)})'


def pretty_format_value_in_list(value, encoding='utf8', prefix=None):
    """
    Returned pretty formated value to display in list

    That method will prefix value with line return and incremented prefix
    if pretty formated value contains line return.
    """
    prefix = prefix if prefix else ""
    value = pretty_format_value(value, encoding, prefix)
    if '\n' in value:
        inc_prefix = increment_prefix(prefix)
        value = "\n" + "\n".join([
            inc_prefix + line
            for line in value.split('\n')
        ])
    return value


def pretty_format_dict(value, encoding='utf8', prefix=None):
    """ Returned pretty formated dict to display """
    prefix = prefix if prefix else ""
    result = []
    for key in sorted(value.keys()):
        result.append(
            f'{prefix}- {key} : ' +
            pretty_format_value_in_list(
                value[key],
                encoding=encoding,
                prefix=prefix
            )
        )
    return "\n".join(result)


def pretty_format_list(row, encoding='utf8', prefix=None):
    """ Returned pretty formated list to display """
    prefix = prefix if prefix else ""
    result = []
    for idx, values in enumerate(row):
        result.append(
            f'{prefix}- #{idx} : ' +
            pretty_format_value_in_list(
                values,
                encoding=encoding,
                prefix=prefix
            )
        )
    return "\n".join(result)